Abstract
Lightweight concrete beams (50 × 75 × 850 mm) using foamed slag aggregate were tested in flexure at steady state temperatures up to 600°C. The properties investigated were thermal movement, ultimate strength, flexural rigidity and weight loss. The results were compared with those of identically dimensioned specimens made from concrete using sintered pulverized fuel-ash (pfa) aggregate and gravel aggregate. Foamed slag concrete exhibited characteristics somewhat similar to those of sintered pfa concrete, and performed better than gravel aggregate concrete.